observant

1 paying close attention usually for the purpose of anticipating approaching danger or opportunity <if you were more observant, you would perceive that something is troubling her deeply> Synonyms Argus-eyed, attentive, awake, alert, open-eyed, tenty (also tentie) [Scottish], vigilant, watchful, wide-awakeRelated Words alive, aware, conscious, sensitive; cognizant, heedful, keen, mindful, observing, regardful, sharp, sharp-eyed; hyperalert, hypervigilant, sleepless, wakeful; careful, cautious, chary, wary; prepared, readyNear Antonyms absent, absentminded, absorbed, abstracted, daydreaming, dazed, distracted, dreaming, dreamy, engrossed, faraway, insensible, oblivious, preoccupied; sleeping, unaware, unconscious, unknowing, unwitting; careless, heedless, inattentive, unheeding, unmindful, unthinking, unwary; unprepared, unreadyAntonyms asleep

2 having the mind fixed on something <observant viewers will notice that the position of hero’s facial wound changes in the course of the scene> Synonyms absorbed, deep, engrossed, enthralled, focused (also focussed), immersed, intent, attentive, raptRelated Words engaged, interested, intrigued, involved; hypnotized, mesmerized; alert, alive, conscious, open-eyed, watchful, wide-awakeNear Antonyms daydreaming, dreamy, faraway, foggy, hazy, lost, oblivious, preoccupied, remote; apathetic, disinterested, uninterestedAntonyms absent, absentminded, abstracted, distracted, inattentive, inobservant, unabsorbed, unfocused (also unfocussed)